Configure DeepSeek Harness through Requesty

[devin-ai-integration]

Summary

Adds DeepSeek Harness (dsh) as a sixth harness. DeepSeekHarness follows the Hermes pattern (YAML, merge and overwrite, shared backup helpers), with two differences worth knowing:

• Two files. The harness settings file cannot hold a key, only a credential name, so the key goes to a second file the harness reads by that name:

  # $DSH_HOME/settings.yamlllm-pi-ai:
  providers:
  requesty:
  apiKeyEnv: REQUESTY_API_KEYapi: openai-completionsbaseURL: https://router.requesty.ai/v1# $DSH_HOME/.credentials.yamlREQUESTY_API_KEY: rqsty-...

  The credentials file is merged, never replaced, including on the overwrite path, so a user's DEEPSEEK_API_KEY survives. The harness rejects that file if any group or other permission bit is set, which the existing 0o600 write already satisfies. Status requires the stored key as well as the provider, since settings alone do not authenticate.

• Config directory follows DSH_HOME.DefaultConfigDirDeepSeek returns $DSH_HOME when set and ~/.dsh otherwise, matching where the harness itself looks. Every other harness has a fixed directory.

baseURL keeps the /v1 suffix because the provider speaks openai-completions. Unlike Pi and Hermes there is no Anthropic Messages path here: that protocol works against the router without the suffix, but the harness sends no cache hint, so it buys nothing and costs the OpenAI-format model coverage.

Verified against the real harness rather than only in tests: Configure wrote a DSH_HOME, and dsh --profile headless then ran a task end-to-end through the router on that exact generated config.

Docs page: requestyai/docs#161.

Link to Devin session: https://app.devin.ai/sessions/41af85ae3a0e49dabf09aaa96532d04e
Requested by: @requesty-ditti

[devin-ai-integration]

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_{Updated 2026-08-15T20:12Z · last 30 days · data from Requesty}